Vocabulary
We live on this layer of the earth
crust
a break in the earth's crust is called a
fault
true or false: scientists rejected the theory of continental drift because they didn't believe any force was strong enough to move continents
true!
a break in the earth's crust is a
fault
the underground point where an earthquake occurs is called the
focus
The innermost layer of earth
core
true or false: the inner core is liquid, and the outer core is solid
FALSE!
The name of the ancient supercontinent was
Pangaea
theory that states that pieces of the lithosphere constantly move on top of a layer of partly melted rock
plate tectonics
earthquake damage may be the greatest closest to the
epicenter
This is the layer of the earth that contains most of the earth's mass
mantle
two plates meet at a
plate boundary
What is the name of the process that causes earth's plates to move?
convection
seafloor spreading occurs at a ________ boundary
spreading
material from the melted layer of the mantle is called ________ when it reaches earth's surface
lava
the crust and upper part of the mantle
lithosphere
________ is the theory that explains how the plates on earth's surface move and change earth
plate tectonics
what one thing proved the theory of continental drift?
magnetism
What kind of boundary formed the rocky mountain?
colliding
an instrument called a ___________ detects tremors
seismometer
the theory that continents drifted apart in the past and continue to do so today
continental drift
True or false: All of earth's features (like mountains and valleys) are found on dry land
false! many of these features still exist underwater
_________ introduced the theory of continental drift
Alfred Wegener
deep ocean trenches can form at a __________ boundary
colliding
an instrument called a ________ detects changes in the slope of a volcano